Georges nicolet



(No Model.) v f G'. NIOOLET.

` STOP WATGH.

No. 490,123. Pat ted Jan. 1'7, 1893. l J 3&1

kUNITED STATES PATENT OFFICE.

GEORGES NICOLET, OF CHAUXDE-FONDS, SWITZERLAND.

STOP-WATCH.

SPECIFICATION forming part of Letters Patent No. 490,123, dated January17, 1893.

Application filed .Tuly l1, 1892. Serial No. 439,695. (No model.)

T0 @ZZ whom t may concern,.-

Beitknown that I, GEORGES NIOOLET,\vatcl1 manufacturer, ofGhaux-de-Fonds, Switzerland, have invented certain new and usefulImprovements in Stop-ivatches, of which the 'following is aspeciiieat-ion.

The invention refers to that class of stop watches having a handrotating on the center of the watch and tixed toawheel provided with aprojection, pin or thelike which is intended to act once at eachrevolution of said wheel upon the teeth of the wheel carrying the handof the minutes counter or recorder, so as to cause one tooth of saidwheel to be advanced and the said minute counter hand rotated onedivision of its special dialor scale.

The invention especially relates to the device for putting the minutescounter wheel out of action when the said minutes counter is not usedand moving the same when the minutes counter hand is to be set to zero.

In the accompanying drawings Figure l is an elevation of the face andhands of theimproved watch. Fig. 2 is a plan View of the mechanism as itis to be seen after removing the dial and while the said mechanism is inposition for moving the hands. Fig. 8 is a similar plan view when thehands are set to zero. Fig. et shows separately the respective positionof the outcut of wheel G and of the iin ger e when the recording hand isto receive its last movement. Fig. 5 shows separately the respectiveposition of the outcutof Wheel G and of the finger' c when the minutesrecording hand has fulfilled its work, that is to say, when the minutesrecording hand G has been moved its full stroke (for instance from O to30 in Fig. l). Fig. 6 shows in cross section on an enlarged scale thedevice for putting the wheel G out of reach of the linger e when thehands are set to zero. Fig. 7 shows a similar cross section in which thewheel G is out of reach of the linger c.

In all the figures the same letters and numerals refer to the samepieces.

A is a wheel fixed on the axis of one of the watch arbors for drivingthe stop watch mechanism.

Bis an intermediate wheel pivoted to a rocking lever C which is pivotedat c to the plate of the work and bears with its arm C upon the cam Dunder the action of a spring EX which bears upon the small roller cpivoted to the said lever C. According as the arm C bears into an outcutor upon a full part of said cam D the wheel B is in or out of gear witha wheel E, the axis of which bears the independent seconds hand E.

In Fig. 2 of the drawings the wheel B is shown in gear with wheel E, andin Fig. C it is shown out of gear with said Wheel. both positions thesaid wheel Bis in gear with the driving wheel A.

The wheel E or the axis of the same bears a projection, finger or pin eintended to cause the wheel G of the minutes recording device to berotated one tooth at each revolution of said wheel E. The axis g Of thewheel G bears a hand G which moves on a segmental dial or scale H of thewatch dial H. Said wheel G has a number of teeth corresponding` to thenumber of divisions which the scale H would have if it would be a fullcircle and there is provided an outcut g formed by partly or fullycutting away one or more teeth of said wheel G and disposed so as toarrive in front of thevfinger or pin c at the moment the hand G reachesthe end of the scale H', that is to say, in the case shown in thedrawings at the moment the hand G reaches the number 30. The handremains then in place, the finger or pin e passing in front of the wheelG without acting upon its teeth as shown in Fig. LL. rlhen the wheel Gis stopped and the hand G remains in the said position until it is setto zero. This operation is performed by means of a hammer or lever Jwhich falls upon a heart cam K when the projection j falls into anoutcut of the cam D. Nowitwill be easily understood that if the settingto Zero of the hand G takes place While the iinger or projection eis inthe path of the teeth of wheel G, the latter would not be able to followthe impulse given to its heart piece K while having its teeth meetingthe said finger or projection e. I therefore provide a lever J iixed tothe hammer or 1ever .l and having a bevelj which slides upon the top ofthe axis g somewhat before the hammer J strikes the heart piece K.

Fig. 6 shows the beveled part of the lever J and the axis g of wheel Gas they stand when the stop mechanism is going, the wheel Gbeing inreach of the finger or pin e. Fig. 7

IOO

shows the same parts when the beveled part of the lever J has depressedthe axis g so as to place the Wheel G out of reach of the tinger or pine.

There is provided a springtl in a recess tot the plate for lifting thearbor and Wheel G when the leverJis retracted. It will no\vbe readilyunderstood that the Wheel G being thrown into the position of Fig. 7before the hammer J meets the heart piece K, the rotation of said wheelG in either direction for setting the hand G to zero, will take placeWithout having the teeth of the wheel G meeting the finger or pin e.

An arm 5 of the leverJacts 011 a heart ca 6 on the arbor of theindependent seconds hand E to return the latter to zero as usual.

I claim as my invention.

l. The combination with the independent seconds hand and its arbor, of aprojection rotating with such hand, a minutes recording hand and a wheeltherewith connected and receiving a movement from said projection of onetooth each rotation of the independent seconds hand, a heart cam andlever for returning the minutes recording hand to zero, and pushmechanism and an incline and spring for giving an end movement to thearbor of the minutes recording hand to clear the wheel thereof from theprojection and to bring the heart cam into the path of itslever,substantially as specilied.

2. The combination with the independent seconds hand and. its arbor, anda projection revolving therewith, of a minutes recording hand, asegmental scale therefor and a toothed wheel connected with said handand acted on by such projection, there being a notch in the Wheelwhereby its movement is stopped when the hand reaches the end of thesegmental scale, and mechanism substantially as specitied for returningthe hand to zero, as set forth.

In testimonywhereo lhave signed myname to this specication in thepresence of two subscribing witnesses.

GEORGES NICOLE'F.

lVitnesses:

BEN. SCHUTTEL, A. BRANDT.

